fix: resolve pr review comments

Signed-off-by: Yeganathan S <63534555+skwowet@users.noreply.github.com>

Author: skwowet

services/apps/git_integration/src/crowdgit/services/affiliation/affiliation_service.py

@@ -966,7 +966,7 @@ async def process_affiliations(
                 raise AffiliationFileNotFoundError(ai_cost=ai_cost)
 
             file_path_on_disk = os.path.join(batch_info.repo_path, latest_file_path)
-            file_size_bytes = os.path.getsize(file_path_on_disk)
+            file_size_bytes = await aiofiles.os.path.getsize(file_path_on_disk)
             # Too big for llm — mark unusable and move on.
             if file_size_bytes > self.MAX_FILE_SIZE_BYTES:
                 # Steady state: already gave up on this file; getsize is enough.